FTP: ERROR AP NOT FOUND keeps appearing whenever I open savegame_manager

[OnAboat90]

I managed to get Pokedoc's savegame_manager to work in back at my house but now it keeps saying AP NOT FOUND whenever I use it in my currently used internet.

I already:

set the connection to WEP

downloaded smallFTP and turn it on whenever I attempt to connect savegame_manager

have a flashcart to run savegame manager

established an internet connection in the ds lite through a pokemon cartridge and a backup game from the flashcart

I don't know why this problem persists